WARNING: This page is about a different car, the 2001 Subaru Forester and 2000 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
Check continuity of A/C relay and Sub fan relay with a circuit tester (ohm range) according to the following figure.
Fig 1: Checking Continuity Of A/C Relay And Sub Fan Relay